Musical elements anticipating hip hop music have been identified in blues, jazz and rhythm and blues recordings from the 1950s and earlier, including several records by Bo Diddley.[citation needed] Muhammad Ali‘s 1963 spoken-word album I Am the Greatest is regarded by some writers as an early example of hip hop.[31][32][better source needed] Pigmeat Markham‘s 1968 single “Here Comes the Judge” is one of several songs said to be the earliest hip hop record.[33] Leading up to hip hop, there were spoken-word artists such as the Last Poets who released their debut album in 1970, and Gil Scott-Heron, who gained a wide audience with his 1971 track “The Revolution Will Not Be Televised“. These artists combined spoken word and music to create a kind of “proto-rap” vibe.[34]